Findings:
Large amount of low T1 and low T2 signal periodontoid material with widening of the median atlantoaxial joint, without any obvious erosion of the dens or bone marrow oedema. Thin circumferential fluid within the atlantoaxial joint. No central canal stenosis.
Conclusion:
Advanced degenerative changes of atlantoaxial joint with large amount of periodontoid soft tissue, without obvious bony erosion or bone marrow oedema, suspicious of CPPD without acute inflammation.